Assignments
OMBC106
Assignment: 1
Instructions:
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1
Number of Questions: 30
Maximum Marks: 30
Each question carries 1 Mark.
All questions are compulsory.
Attempts: 1
The form of the alternative hypothesis can be:
one-tailed
two-tailed
neither one nor two-tailed
one or two-tailed
2
A two-tailed test is one where:
results in only one direction can lead to rejection of the null hypothesis
negative sample means lead to rejection of the null hypothesis
results in either of two directions can lead to rejection of the null hypothesis
no results lead to the rejection of the null hypothesis
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4
5
The value set for is known as:
the rejection level
the acceptance level
the significance level
the error in the hypothesis test
In statistical analysis, the burden of proof lies traditionally with:
the alternative hypothesis
the null hypothesis
the analyst
the facts
When one refers to “how significant” the sample evidence is, he/she is referring to the:
value of
the importance of the sample
the p-value
the F-ratio
6
What Refers to the degree of significance in which we accept or reject the null-hypothesis. 100% accuracy is not
Level of significance
Level of importance
p-value
type I error
7
In which error ,we reject the null hypothesis, although that hypothesis was true .
Type I error
Type II error
Any errors
error free
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9
10
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A null hypothesis can only be rejected at the 5% significance level if and only if:
a 95% confidence interval includes the hypothesized value of the parameter
a 95% confidence interval does not include the hypothesized value of the parameter
the null hypothesis is void
the null hypotheses includes sampling error
we accept the null hypothesis but it is false it is called as ________________.
Type II errors
Type I error
Any errors
error free
Why are variance and standard deviation the most popular measures of variability?
They are the most stable and are foundations for more advanced statistical analysis
They are the most simple to calculate with large data sets
They provide nominally scaled data
They provide no scaled data
Why do we use inferential statistics?
Inferential statistics are used to help us to compare the sample to the whole population.
Inferential statistics are used to help us to show the difference between the sample and the whole populati
Inferential statistics are used to help us to generalise from the sample to the whole population.
Inferential statistics can be applied to the use only sample without any population
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What is the degree to which sample statistics differ from the equivalent population parameter known as?
Sampling error.
Selection bias
Selection error
Sample bias
13
Which of the following statements is true?
The smaller the population size, the smaller the relationship will be between the sample mean and the pop
The smaller the sample size, the closer the sample mean will be to the population mean.
The larger the sample size, the closer the sample mean will be to the population mean.
The larger the population size, the closer the population mean will be to the sample mean.
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what is cross sectional designs
a study of one specific segment of consumer
research design that is free from any personal bias
collection of data from more than respondent in the same time period
a comparison of two or more variables over a long period of time .
15
--------involves the testing of the equality of means of two or more groups.
Completely randomized design
Two -way Anova
One way Anova
ANOVA
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17
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Analysis of variance is a statistical method of comparing the ________ of several populations.
standard deviations
variances
means
proportions
The ______ sum of squares measures the variability of the observed values around their respective treatment mea
treatment
error
interaction
total
The ________ sum of squares measures the variability of the sample treatment means around the overall mean.
treatment
error
interaction
total
The function of a post-test in ANOVA is to_____________
Determine if any statistically significant group differences have occurred
Describe those groups that have reliable differences between group means.
Set the critical value for the F test (or chi-square).
Set the critical value for the T test (or chi-square).
20
As variability due to chance decreases, the value of F will ___________________
increase
stay the same
decrease
can’t tell from the given information
21
In ANOVA with 4 groups and a total sample size of 44, the computed F statistic is 2.33 In this case, the p-value is
exactly 0.05
less than 0.05
greater than 0.05
cannot tell - it depends on what the SSE is
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The _______________ is used to determine whether there are any statistically significant differences between the
one-way analysis of variance (ANOVA)
Analysis of Variance
Two-way Anova
Analysis of Variance
A hypothesis is an assumption or a statement that may or may not be true .
True
False
The hypotheses that are proposed with the intent of receiving a rejection for them are called null hypotheses.
True
False
Rejection of null hypotheses leads to the acceptance of alternative hypotheses.
True
False
Which is A test is called one-sided (or one-tailed) only if the null hypothesis gets rejected when a value of the test
True
False
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Which is the test is called two-sided (or two-tailed) if null hypothesis gets rejected when a value of the test statisti
True
False
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29
The acceptance or rejection of a hypothesis is based upon sample results and there is always a possibility of a sam
True
False
The standard deviation as a measure of dispersion is independent of units of measurement
True
False
30
Whether the range could be obtained from interval scale data
True
False
Assignment: 2
Instructions:
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Assignment 2 is based on the following text/paragraph of case study/situational exercise etc.
You first need to read this text and then answer the following MCMR i.e. Multiple choice
multiple response questions.
Number of Questions: 5
Each question carries 2 Mark
All Five Questions are Mandatory.
Attempts: 1
The questions on Jumbled paragraphs will have a set of sentences that all belong to the same paragraph. T
question. Your job is to pick these hints and select the correct order of the sentences. Following sentences a
(B) collecting the data; (C) extensive literature survey; (D) formulating the research problem; (E) hypothe
analysis of data; (H) preparation of the report or presentation of the results, i.e., formal write-up of conclu
2 In the above mentioned research process which should be the first step to start research process.
extensive literature survey;
preparing the research design; determining sample design;
formulating the research problem;
developing the hypothesis;
3 Out of the eight steps of research process mentioned above which step should immediately follow
after hypothesis testing and interpretation.
preparation of the report or presentation of the results, i.e., formal write-up of conclusions reached.
developing the hypothesis;
preparing the research design; determining sample design;
extensive literature survey;
4 From the below mentioned processes, which one should immediately precede Developing the
hypothesis;
collecting the data;
extensive literature survey;
formulating the research problem;
hypothesis testing and interpretation
5 Which step should immediately follow after collecting the data;
analysis of data;
developing the hypothesis;
hypothesis testing and interpretation
preparation of the report or presentation of the results, i.e., formal write-up of conclusions reached.
6 Out of the eight steps of research process mentioned above which should be the third step?
formulating the research problem;
extensive literature survey;
developing the hypothesis;
preparing the research design; determining sample design;